CVE-2026-89535svcrdma: Reorder rpcrdma_rn_unregister before rdma_destroy_id
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In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reorder rpcrdma_rn_unregister before rdma_destroy_id svc_rdma_free() caches rdma->sc_cm_id->device before teardown, then calls rdma_destroy_id(sc_cm_id) which frees the cm_id. rpcrdma_rn_unregister() follows, but between those two calls the transport's sc_rn entry is still installed in the device's rd_xa. A concurrent ib_unregister_device walk can dispatch svc_rdma_xprt_done() against the now-freed sc_cm_id. Move rpcrdma_rn_unregister() before rdma_destroy_id() so the transport's notification entry is removed from the xarray before the cm_id it references is destroyed. Also guard the sc_cm_id dereference with a NULL check: the following patches introduce paths that reach svc_rdma_free() with sc_cm_id == NULL (listener create failure, ADDR_CHANGE replacement failure).
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c4de97f7c45434985e5dbf2d6ccc9eca676e37fe before fcd4a752ac840d39356f4d2a424d3aca4e39716b; from c4de97f7c45434985e5dbf2d6ccc9eca676e37fe before 9f2f5d0999364c7070306cd422d8babc2621070d; from c4de97f7c45434985e5dbf2d6ccc9eca676e37fe before cfca6eb3345ba4a23cf9a1153ad09bf19faabfc9; from c4de97f7c45434985e5dbf2d6ccc9eca676e37fe before 4488e912973773d64368828acf3b8e39d93650ae | CNA record |
References
- https://git.kernel.org/stable/c/fcd4a752ac840d39356f4d2a424d3aca4e39716b
- https://git.kernel.org/stable/c/9f2f5d0999364c7070306cd422d8babc2621070d
- https://git.kernel.org/stable/c/cfca6eb3345ba4a23cf9a1153ad09bf19faabfc9
- https://git.kernel.org/stable/c/4488e912973773d64368828acf3b8e39d93650ae
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.